Debt and Credit Facilities - Narrative (Details)	12 Months Ended
	Dec. 30, 2023 USD ($) extension_option	Dec. 31, 2022 USD ($)	Jan. 01, 2022 USD ($)
Debt Instrument [Line Items]
Minimum fixed charge coverage required to be maintained by subsidiary	125.00%
Minimum shareholders equity required to be maintained by subsidiary	$ 125,000,000
Cash paid to TFC to maintain compliance with covenants	0	$ 0	$ 0
Floating Rate Junior Subordinated Notes | Finance group | Floating Rate Junior Subordinated Notes
Debt Instrument [Line Items]
Debt instrument, face amount	$ 264,000,000
Debt instrument, maturity date	Feb. 15, 2067
Debt Instrument call date latest	Feb. 15, 2042
Repurchase amount	$ 8,000,000	17,000,000
Floating Rate Junior Subordinated Notes | Finance group | Floating Rate Junior Subordinated Notes | CME Term Secured Overnight Financing Rate
Debt Instrument [Line Items]
Debt instrument description of variable rate basis after specified term at fixed rate	three-month CME Term Secured Overnight Financing Rate
Interest rate spread	1.99661%
Senior Unsecured Revolving Credit Facility Expires October2027 | Line of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,000,000,000
Portion available for issuance of letters of credit against facility	100,000,000
Borrowing capacity Textron may elect to increase to	$ 1,300,000,000
Number of one-year extensions | extension_option	2
Extension period (in years)	1 year
Amount borrowed against facility	$ 0	0
Letter of Credit | Line of Credit
Debt Instrument [Line Items]
Outstanding letters of credit	$ 9,000,000	$ 9,000,000